The cause of a schoolboy's death remains unknown in spite of investigations by four specialists.

Lee Frizzle, aged 16, of Cowpen Estate, Blyth, collapsed in April after coming home from school during a lunch break.

He told his mother June that he was going up to his bedroom to eat his lunch. But moments later he collapsed on the floor.

Paramedics tried to resuscitate him but he was pronounced dead on arrival at Wansbeck General Hospital.

A post-mortem was conducted and extensive tests were carried out. But nothing was found to explain his death.

At the time of his death Lee's dad said that his son had no bad habits, he lived for his computer and was expecting to do well at his GCSEs.

Mr McCreath said: "Strenuous efforts have been made to find a cause of death, but it has not been possible to do so. The best efforts of the medical profession have not been able to come up with a cause of death."